Business envelopes, also known as commercial envelopes, are characteristically open side style with diagonal seams. #10 window business envelopes measure 4-1/8" x 9-1/2", are made from various paper stocks and have a poly window.

Business envelopes, also known as commercial envelopes, are characteristically open side style with diagonal seams. #10 window business envelopes measure 4-1/8" x 9-1/2", are made from various paper stocks and have a poly window.

White #10 window business envelopes are used for standard mailing purposes such as: